Finding the Fourth Proportional to 78,457.94, 117,642.61 and 71,763.03

Step by Step Solution

1. Step 1: Write the proportion equation
   78,457.94 : 117,642.61 = 71,763.03 : x
2. Step 2: Convert to fraction form
   78,457.94/117,642.61 = 71,763.03/x
3. Step 3: Cross multiply
   78,457.94x = 117,642.61 × 71,763.03
4. Step 4: Simplify right side
   78,457.94x = 8,442,389,791.89
5. Step 5: Solve for x
   x = 8,442,389,791.89/78,457.94
6. Step 6: Final answer
   x = 107,604.02